Halenia recurva (Sm.) C.K. Allen [ Halenia rothrockii A. Gray]
no HD illustration available (m1)
Halenia recurva (Sm.) C.K. Allen [ Swertia recurva Sm.] [Gentianaceae]
J.T. Rothrock, Rep. U.S. Geogr. Surv., Wheeler: t. 21 (1878) [Sprague]